Hello- ARIN received the IPv4 address blocks 74.0.0.0 /8 and 75.0.0.0 /8 and 76.0.0.0 /8 from the IANA on June 17, 2005. In the near future, ARIN will begin making allocations from these new blocks. This will include allocations of /20 and shorter prefixes, according to ARIN's minimum allocation policy. You may wish to adjust any filters you have in place accordingly. For informational purposes, a list of ARIN's currently administered IP blocks can be found under "CIDR Blocks" at: http://www.arin.net/statistics/index.html Regards, Leslie Nobile Director, Registration Services American Registry for Internet Numbers (ARIN)